US20170259368A1 - Arc welder with variable-frequency auxiliary power output - Google Patents

Arc welder with variable-frequency auxiliary power output Download PDF

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Publication number
US20170259368A1
US20170259368A1 US15/067,295 US201615067295A US2017259368A1 US 20170259368 A1 US20170259368 A1 US 20170259368A1 US 201615067295 A US201615067295 A US 201615067295A US 2017259368 A1 US2017259368 A1 US 2017259368A1
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US
United States
Prior art keywords
power supply
frequency
auxiliary power
variable
arc welding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/067,295
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English (en)
Inventor
Edward A. Enyedy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lincoln Global Inc
Original Assignee
Lincoln Global Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lincoln Global Inc filed Critical Lincoln Global Inc
Priority to US15/067,295 priority Critical patent/US20170259368A1/en
Assigned to LINCOLN GLOBAL, INC. reassignment LINCOLN GLOBAL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENYEDY, EDWARD A.
Priority to EP17000154.9A priority patent/EP3216550B1/en
Priority to CN201710112611.9A priority patent/CN107175386A/zh
Priority to JP2017043640A priority patent/JP2017159365A/ja
Publication of US20170259368A1 publication Critical patent/US20170259368A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/095—Monitoring or automatic control of welding parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B23K9/1043—Power supply characterised by the electric circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/095—Monitoring or automatic control of welding parameters
    • B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B23K9/1043—Power supply characterised by the electric circuit
    • B23K9/1056—Power supply characterised by the electric circuit by using digital means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories

Definitions

  • the present invention relates to an arc welder powered by a generator and having an auxiliary power output for suppling electrical energy to auxiliary loads, such as lights, power tools, and the like.
  • Arc welding machines can be powered by engine-generators, allowing the arc welding machines to be operated independent of a source of utility power.
  • Such arc welding machines can have an auxiliary power outputs (e.g., outlets) that allow other electrical devices to be operated.
  • the frequency of the auxiliary power e.g., 60 Hz
  • the frequency of the auxiliary power typically depends on the operating speed (e.g., RPM) of the engine driving the generator. It would be desirable to provide an arc welding system in which the frequency of the auxiliary power output is both user-adjustable and independent of the engine speed.
  • Example aspects and embodiments of the present invention are summarized below. It is to be appreciated that the example aspects and/or embodiments may be provided separately or in combination with one another.
  • an arc welding system comprising a welding power supply.
  • the welding power supply includes a switching type power converter.
  • a welding electrode is operatively connected to the switching type power converter to receive electrical energy from the switching type power converter and produce an electric arc from the arc welding system.
  • a variable-frequency auxiliary power supply supplies electrical energy to an auxiliary load through an auxiliary power output of the arc welding system.
  • An engine-generator is operatively connected to the welding power supply and the variable-frequency auxiliary power supply, to supply electrical energy to the welding power supply to produce the electric arc, and to supply further electrical energy to the variable-frequency auxiliary power supply.
  • a controller is operatively connected to the variable-frequency auxiliary power supply and is configured to control an output voltage frequency of the variable-frequency auxiliary power supply according to an auxiliary power supply frequency setting.
  • the output voltage frequency of the variable-frequency auxiliary power supply is independent from an engine speed of the engine-generator.
  • an arc welding system comprising a welding power supply.
  • the welding power supply includes a switching type power converter.
  • a welding electrode is operatively connected to the switching type power converter to receive electrical energy from the switching type power converter and produce an electric arc from the arc welding system.
  • a first variable-frequency auxiliary power supply supplies electrical energy to a first auxiliary load through a first auxiliary power output of the arc welding system.
  • a second variable-frequency auxiliary power supply supplies electrical energy to a second auxiliary load through a second auxiliary power output of the arc welding system.
  • An engine-generator is operatively connected to the welding power supply, the first variable-frequency auxiliary power supply, and the second variable-frequency auxiliary power supply, to supply electrical energy to the welding power supply to produce the electric arc, and to supply further electrical energy to the first and second variable-frequency auxiliary power supplies.
  • a controller is operatively connected to the first and second variable-frequency auxiliary power supplies and is configured to control a first output voltage frequency of the first variable-frequency auxiliary power supply according to a first auxiliary power supply frequency setting, and to control a second output voltage frequency of the second variable-frequency auxiliary power supply according to a second auxiliary power supply frequency setting.
  • a position signal receiver is operatively connected to the controller, and is configured to receive a position signal and generate current position information based on the position signal. The controller automatically determines the first auxiliary power supply frequency setting and an output voltage level of the first variable-frequency auxiliary power supply based on the current position information.
  • an arc welding system comprising a welding power supply.
  • the welding power supply includes a switching type power converter.
  • a welding electrode is operatively connected to the switching type power converter to receive electrical energy from the switching type power converter and produce an electric arc from the arc welding system.
  • a variable-frequency auxiliary power supply supplies electrical energy to an auxiliary load through an auxiliary power output of the arc welding system.
  • An engine-generator is operatively connected to the welding power supply and the variable-frequency auxiliary power supply, to supply electrical energy to the welding power supply to produce the electric arc, and to supply further electrical energy to the variable-frequency auxiliary power supply.
  • a controller is operatively connected to the variable-frequency auxiliary power supply and is configured to control an output voltage frequency of the variable-frequency auxiliary power supply according to an auxiliary power supply frequency setting.
  • a global navigation satellite system (GNSS) receiver is operatively connected to the controller, and is configured to receive GNSS signals and generate current position information based on the GNSS signals, wherein the controller automatically determines the auxiliary power supply frequency setting and output voltage level based on the current position information.
  • GNSS global navigation satellite system
  • FIG. 1 is a schematic diagram of an example arc welding system
  • FIG. 2 is a schematic diagram of an example arc welding system
  • FIG. 3 is a schematic diagram of an example arc welding system
  • FIG. 4 is a schematic diagram of an example arc welding system.
  • the present invention relates to arc welders powered by an engine-generator and having one or more variable-frequency auxiliary power outputs for supplying electrical energy to auxiliary loads.
  • the present invention will now be described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. It is to be appreciated that the various drawings are not necessarily drawn to scale from one figure to another nor inside a given figure, and in particular that the size of the components are arbitrarily drawn for facilitating the understanding of the drawings.
  • numerous specific details are set forth in order to provide a thorough understanding of the present invention. It may be evident, however, that the present invention can be practiced without these specific details. Additionally, other embodiments of the invention are possible and the invention is capable of being practiced and carried out in ways other than as described.
  • the terminology and phraseology used in describing the invention is employed for the purpose of promoting an understanding of the invention and should not be taken as limiting.
  • welding refers to an arc welding process.
  • Example arc welding processes include shielded metal arc welding (SMAW) (e.g., stick welding), flux cored arc welding (FCAW), and other welding processes such as gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), and the like.
  • SMAW shielded metal arc welding
  • FCAW flux cored arc welding
  • GMAW gas metal arc welding
  • GTAW gas tungsten arc welding
  • FIG. 1 An example arc welding system 10 is shown schematically in FIG. 1 .
  • the welding system 10 includes a generator 12 driven by an engine 14 thereby forming an engine-generator.
  • Example engines include diesel engines, gasoline engines, LP gas engines, and the like.
  • the generator 12 generates electrical energy for powering a welding power supply 16 (hereinafter “welder”).
  • the generator 12 is shown schematically as being a synchronous 3-phase alternator. However, the generator need not be a synchronous 3-phase alternator. For example, the generator could be a single phase alternator or a DC generator if desired.
  • the welder 16 includes circuitry for generating a welding waveform during arc welding.
  • a welding operation is schematically shown in FIG. 1 as an electric arc 18 extending between a welding electrode 20 (consumable or non-consumable) and a workpiece 22 .
  • the welder 16 also includes circuitry for providing AC or DC power to one or more auxiliary power outputs 24 , 26 (e.g., Aux 1 and Aux 2 in FIG. 1 ).
  • the auxiliary power outputs 24 , 26 provide electrical power to auxiliary loads 28 , 30 .
  • Example auxiliary loads that can be powered by the welder 16 include tools, lights, pumps, chargers and the like.
  • the auxiliary power will be supplied by the generator 12 .
  • the arc welding system is a hybrid powered arc welding system having one or more batteries for supplying electrical energy to the welder, the auxiliary power can also by supplied from the batteries.
  • the auxiliary power outputs 24 , 26 can include appropriate outlets for facilitating connections to the auxiliary loads 28 , 30 .
  • Example outlets include, for example, NEMA standard outlets commonly found in North America, CEE outlets commonly found in Europe, and other styles of outlets.
  • the auxiliary power outputs 24 , 26 can include multiple styles of outlets to readily accommodate use in different geographical locations around the world, or the welder 16 can include appropriate adapters to convert one style of outlet to another.
  • the auxiliary power outputs 24 , 26 are variable-frequency auxiliary power outputs.
  • the output voltage frequencies of the auxiliary power outputs can be adjusted.
  • the output voltage at the auxiliary power outputs 24 , 26 is provided by one or more inverters within the welder 16 .
  • the welder 16 includes a controller 32 that is operatively connected to the inverter(s) to control the characteristics (e.g., frequency and voltage level) of the output voltage at the auxiliary power outputs 24 , 26 .
  • the controller 32 can provide different voltage levels and frequencies at the auxiliary power outputs 24 , 26 .
  • the auxiliary power outputs 24 , 26 can be controlled to provide 60 Hz power at a desired voltage level (e.g., 120V, 240V etc.) When used in Europe, the auxiliary power outputs 24 , 26 can be controlled to provide 50 Hz power at a desired voltage level (e.g., 220V). Other frequencies and voltages are possible. For example, when used at an airport, the auxiliary power outputs can be controlled to provide 400 Hz power at 120V.
  • the controller 32 sets the output voltage frequencies of the auxiliary power outputs 24 , 26 according to one or more auxiliary power supply frequency settings (e.g., 0 Hz or DC, 50 Hz, 60 Hz, 400 Hz, etc.).
  • the controller 32 also sets the output voltage level according to one or more auxiliary power supply voltage settings (e.g., 100V, 120V, 208V, 220V, 240V, etc.)
  • the controller has an associated memory portion 34 for storing the settings for the auxiliary power outputs.
  • the welder 16 includes a user interface 36 operatively connected to the controller 32 for receiving the frequency and/or voltage settings for the auxiliary power outputs 24 , 26 directly from a user of the welding system 10 .
  • the user interface 36 can also allow various welding parameters to be set, such as welding voltage and current, a welding waveform, welding wire feed speed, etc.
  • the welder 16 can include a position signal receiver 38 that is configured to receive a position signal and generate current position information based on the position signal.
  • the current position information includes data that identifies the current position of the position signal receiver 38 , and thus the welder 16 .
  • the position signal receiver 38 is operatively connected to the controller 32 and communicates with the controller to periodically transmit the current position information to the controller.
  • the controller 32 can automatically determine the auxiliary power supply frequency setting and output voltage level based on the current position information provided by the position signal receiver 38 . To do this, the controller 32 can be programmed with appropriate default frequency and voltage level settings for different geographic locations around the world.
  • the welder 16 can automatically determine its current geographical location and set the frequency and/or voltage level of the auxiliary power outputs 24 , 26 according to the current geographical location. Such settings can be manually overridden via the user interface 36 if desired. As the welding system 10 is moved from one location to another, the voltage and frequency settings of the auxiliary power outputs 24 , 26 can be adjusted, either automatically or manually, to settings appropriate to the current location.
  • GNSS receiver 38 receives GNSS signal transmissions from satellites in orbit and, based on the time of travel of each of the transmissions, determine the position of the GNSS receiver.
  • GNSS receivers include Global Positioning System (GPS) receivers and receivers for the Galileo and GLONASS systems.
  • GPS Global Positioning System
  • the controller 32 can be an electronic controller and may include a processor.
  • the controller 32 can include one or more of a microprocessor, a microcontroller, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), discrete logic circuitry, or the like.
  • the controller 32 can include the memory portion 34 (e.g., RAM or ROM) storing program instructions that cause the controller to provide the functionality ascribed to it herein.
  • FIG. 2 provides another schematic diagram of an example arc welding system 10 with additional details of the welder shown.
  • Armature windings in the generator 12 supply electrical power to a switching type power converter 40 within the welder.
  • Example switching type power converters include DC choppers, inverters, and the like.
  • AC power from the generator is rectified by a rectifier 42 within the power converter 40 .
  • the DC output from the rectifier 42 supplies the welder's DC bus 43 .
  • the DC bus 43 supplies electrical power to a switching circuit, such as chopper or inverter 44 .
  • Electrical leads 46 , 48 from the chopper/inverter 44 provide a completed circuit for the arc welding current.
  • the arc welding current flows from the chopper/inverter 44 through the electrode 20 , across the arc 18 , and through the workpiece 22 .
  • the welding electrode 20 and workpiece 22 are operatively connected to the switching type power converter 40 via the electrical leads 46 , 48 .
  • the welding electrode 20 receives electrical energy from the switching type power converter 40 (as supplied by the engine-generator) for producing the arc 18 .
  • the controller 32 is operatively connected to the switching type power converter 40 to provide control signals to the switching type power converter to control the welding waveform.
  • the controller 32 can monitor various aspects of the welding process via feedback signals (e.g., welding current/voltage) and adjust welding parameters during arc welding accordingly.
  • the controller 32 is also operatively connected to a variable-frequency auxiliary power supply 50 for supplying electrical energy to the auxiliary load 28 through the auxiliary power output 24 .
  • the controller 32 controls the output frequency and/or voltage level of the variable-frequency auxiliary power supply 50 as discussed above.
  • the generator 12 supplies electrical power to both the variable-frequency auxiliary power supply 50 and the switching type power converter 40 .
  • the variable-frequency auxiliary power supply 50 is effectively electrically isolated from the chopper/inverter 44 and the arc welding current.
  • the variable-frequency auxiliary power supply 50 can include a rectifier 52 and an inverter 54 for generating a desired AC output voltage and frequency from the power output of the generator 12 .
  • the generator 12 can be configured to supply 3-phase electrical power to the variable-frequency auxiliary power supply 50 as shown in FIG. 2 , or single phase electrical power if desired.
  • the output of the variable-frequency auxiliary power supply 50 can be adjusted manually or automatically as discussed above to meet the requirements of the auxiliary load that is to be powered from the variable-frequency auxiliary power supply.
  • the output voltage frequency of the variable-frequency auxiliary power supply 50 is independent from the speed (RPM) of the engine 14 .
  • the frequency of the electrical power supplied by the generator 12 is dependent upon the rotational speed of the engine 14 .
  • the output voltage frequency that is supplied to the auxiliary load 28 can be different from the frequency of the electrical power supplied by the generator. Fluctuations in the speed of the engine 14 , e.g., under varying load conditions, will not affect the output voltage frequency of the variable-frequency auxiliary power supply 50 .
  • FIG. 3 provides another schematic diagram of an example arc welding system 10 .
  • the variable-frequency auxiliary power supply includes an inverter 54 , but no rectifier.
  • the inverter 54 is powered by the welder's DC bus 43 .
  • the DC bus 43 and the rectifier 42 are sized appropriately to simultaneously supply electrical energy to both the chopper/inverter 44 in the switching type power converter 40 and the inverter 54 in the variable-frequency auxiliary power supply 50 .
  • FIG. 4 provides still another schematic diagram of an example arc welding system 10 .
  • the system shown in FIG. 4 is similar to that in FIG. 2 , with the addition of a second variable-frequency auxiliary power supply 56 .
  • the second variable-frequency auxiliary power supply 56 includes a rectifier 58 and inverter 60 separate from the first variable-frequency auxiliary power supply 50 .
  • the second variable-frequency auxiliary power supply 56 supplies electrical energy to a second auxiliary load 30 through a second auxiliary power output 26 .
  • the output voltage and the frequency of the power supplied by the second variable-frequency auxiliary power supply 56 can be set independent from the first variable-frequency auxiliary power supply 50 .
  • the welder can simultaneously supply different voltages and/or frequencies for different auxiliary loads.
  • the first variable-frequency auxiliary power supply 50 could be set to provide power at 120V, 60 Hz (or 220, 50 Hz) and the second variable-frequency auxiliary power supply could be set to provide power at a different voltage/frequency (e.g., 120V, 400 Hz).
  • the auxiliary power outputs 24 , 26 are electrically isolated from each other and from the welding current.
  • the frequency and/or voltage provided by the first and second variable-frequency auxiliary power supplies 50 , 56 can be determined automatically via the current position information from the position signal receiver 38 ( FIG. 1 ), or manually via the user interface 36 .
  • the output frequency of the second variable-frequency auxiliary power supply 56 is independent from the speed (RPM) of the engine 14 .
  • the inverter 60 in the second variable-frequency auxiliary power supply 56 could be powered directly from the welder's DC bus 43 .
  • arc welding system with two auxiliary power outputs and variable-frequency auxiliary power supplies are shown in the figures. However, the arc welding system can include additional auxiliary power outputs and variable-frequency auxiliary power supplies if desired.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)
  • Inverter Devices (AREA)
US15/067,295 2016-03-11 2016-03-11 Arc welder with variable-frequency auxiliary power output Abandoned US20170259368A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US15/067,295 US20170259368A1 (en) 2016-03-11 2016-03-11 Arc welder with variable-frequency auxiliary power output
EP17000154.9A EP3216550B1 (en) 2016-03-11 2017-02-01 Arc welding system with variable-frequency auxiliary power output
CN201710112611.9A CN107175386A (zh) 2016-03-11 2017-02-28 具有变频辅助功率输出的电弧焊机
JP2017043640A JP2017159365A (ja) 2016-03-11 2017-03-08 可変周波数予備電力出力部を有するアーク溶接機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/067,295 US20170259368A1 (en) 2016-03-11 2016-03-11 Arc welder with variable-frequency auxiliary power output

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EP (1) EP3216550B1 (zh)
JP (1) JP2017159365A (zh)
CN (1) CN107175386A (zh)

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US20190143438A1 (en) * 2017-11-13 2019-05-16 Illinois Tool Works Inc. Engine driven generator for providing welding power
US20210060680A1 (en) * 2019-08-28 2021-03-04 Lincoln Global, Inc. Systems and methods providing coordinated dual power outputs supporting a same welding or auxiliary power process
CN112727789A (zh) * 2021-01-14 2021-04-30 西安陕鼓动力股份有限公司 一种调速型双四象限变频器的能量回收系统的控制方法
US11253942B2 (en) * 2017-09-08 2022-02-22 Illinois Tool Works Inc. Methods and apparatus for automatic control of a welding-type power supply
US11305369B2 (en) 2018-08-29 2022-04-19 Lincoln Global, Inc. Engine-based welder with auto-start feature

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US6812585B2 (en) * 2002-12-10 2004-11-02 Illinois Tool Works Inc. Fuel cutoff system for engine-driven generator
WO2007044135A1 (en) * 2005-10-07 2007-04-19 Illinois Tool Works Inc. Wireless communication system for welding-type devices
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US20020047000A1 (en) * 2000-03-31 2002-04-25 Illinois Tool Works Inc. Method and apparatus for receiving a universal input voltage in a welding, plasma or heating power source
US20080295702A1 (en) * 2004-01-07 2008-12-04 Rational Ag Cooking Device with a Predetermined Parameter, Program and/or Mode of Operation
US20070080153A1 (en) * 2005-10-07 2007-04-12 Bruce Albrecht Wireless tracking and inventory monitoring for welding-type devices
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Cited By (8)

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Publication number Priority date Publication date Assignee Title
US11253942B2 (en) * 2017-09-08 2022-02-22 Illinois Tool Works Inc. Methods and apparatus for automatic control of a welding-type power supply
US20190143438A1 (en) * 2017-11-13 2019-05-16 Illinois Tool Works Inc. Engine driven generator for providing welding power
US10875118B2 (en) * 2017-11-13 2020-12-29 Illinois Tool Works Inc. Engine driven generator for providing welding power
US11305369B2 (en) 2018-08-29 2022-04-19 Lincoln Global, Inc. Engine-based welder with auto-start feature
US20210060680A1 (en) * 2019-08-28 2021-03-04 Lincoln Global, Inc. Systems and methods providing coordinated dual power outputs supporting a same welding or auxiliary power process
US20220402062A1 (en) * 2019-08-28 2022-12-22 Lincoln Global, Inc. Systems and methods providing coordinated dual power outputs supporting a same welding or auxiliary power process
US20220410301A1 (en) * 2019-08-28 2022-12-29 Lincoln Global, Inc. Systems and methods providing coordinated dual power outputs supporting a same welding or auxiliary power process
CN112727789A (zh) * 2021-01-14 2021-04-30 西安陕鼓动力股份有限公司 一种调速型双四象限变频器的能量回收系统的控制方法

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EP3216550A1 (en) 2017-09-13
JP2017159365A (ja) 2017-09-14
CN107175386A (zh) 2017-09-19
EP3216550B1 (en) 2019-04-10

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Owner name: LINCOLN GLOBAL, INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ENYEDY, EDWARD A.;REEL/FRAME:037952/0753

Effective date: 20160308

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION